Jakarta – An activist and the widow of slain rights campaigner Munir Said Thalib have asked the Attorney General's Office to provide more evidence in seeking a review of a Supreme Court acquittal of the main suspect in the murder case.

In a December 2006 verdict, the court acquitted Pollycarpus Budihari Priyanto, a Garuda Indonesia pilot, of murdering Munir citing legal technicalities.

"I'm afraid if the Attorney General's Office (AGO) asks for a review of the case with the current evidence it will not uncover other parties involved in the murder case," Usman Hamid, a rights activist and former member of a government-sanctioned fact-finding team for the case, told reporters Friday.

He said the perpetrators of Munir's murder can be grouped into three categories: planners, helpers and executors. "With the current evidence, the AGO can only touch the third category, the executor, while the other two will remain untouchable," Usman said.

Munir died of arsenic poisoning Sept. 7, 2004, while on board Garuda flight 974 from Indonesia to the Netherlands after having departed Singapore, where the plane stopped in transit.

Usman said that with recently uncovered evidence, the AGO could still only prosecute the "helpers", which, in this case, are officials from Garuda Indonesia.

Investigators recently announced two new suspects in the case, former Garuda president Indra Setiawan and secretary to Garuda's chief pilot Rohainil Aini. "It will be better if the review attempt goes along with new evidence and new suspects," Usman said.

Suciwati, Munir's widow, said she is merely seeking justice. "It's almost three years since the death of Munir, but the main perpetrator remains a mystery," she said.

She expressed hope, however, that the identities of those guilty of instigating Munir's murder will eventually be revealed. "Actually, we can easily find who was behind it. But in this country, when a case allegedly involves government and military officials, the law becomes blind," she said.

Suciwati questioned President Susilo Bambang Yudhoyono's resolve to settle the case. "It is apparent that his is only a half-hearted commitment. "The investigation results of the fact-finding team established by the President have never been published or been followed up," she said.

Choirul Anam, Suciwati's lawyer, said investigators should have already been able to draw conclusions on the murder from the available evidence.

"Starting from fake documents which were used by Pollycarpus to get on the same plane with Munir, then phone call records between Pollycarpus and officials at the National Intelligence Agency, and many others," he said. "All of those should be enough to (identify) the main actor, but then it will depend on the will of the officials handling the case to uncover it."

Suciwati also criticized the police investigation team, the makeup of which she said has been repeatedly altered. "Each time the team is changed, they always start from the beginning instead of continuing from the previous investigation," she said.

Usman said the longer Munir's murder is left unresolved, the greater the chance is it will be politicized, especially considering the closeness of the 2009 election.